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31 Cards in this Set
- Front
- Back
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What device is used to separate subnets?
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a router
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What are the three default subnet masks?
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255.0.0.0 (Class A), 255.255.0.0 (Class B), 255.255.255.0 (Class C)
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What is the first octet range for Class A networks?
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1-127
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What is the first octet range for Class B networks?
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129-191
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What is the first octet range for class C networks?
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192-223
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What is the maximum number of Class A networks available?
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127
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What is the maximum number of Class B networks available?
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16,383
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What is the maximum number of Class C networks available?
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2,097,151
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What three address ranges are reserved for private networks?
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10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16
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What standard defines Ethernet?
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IEEE 802.3
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Who originally develeoped Ehthernet?
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Digital, Intel, and Xerox (DIX)
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What does Ethernet do when it detects a collision
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waits a random period of time and resends
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When not using auto-detect, how should a NIC be configured when connected to a hub?
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half-duplex
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What media access control method does Ethernet use?
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Carrier Sense Multiple Access with Collision Detection (CSMA/CD)
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What is the maximum packet size for Ethernet?
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1518 bytes
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What standard defines Fast Ethernet?
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802.3u
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What is the maximum speed of Fast Ethernet?
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100 Mbps
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What cable type is required for 10BaseT?
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Cat3
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What are the three types of Fast Ethernet?
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100BaseTX, 100BaseFX, and 100BaseT4
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What cable type does 100BaseTX require?
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Cat5
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What cable type does 100BaseFX require?
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fiber optic
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What cable type does 100BaseT4 require?
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Cat3 (uses 2 extra wires)
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What standard defines Gigabit Ethernet?
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IEEE 802.3z
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What is the 5-4-3 rule?
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Ethernet can support a maximum of 5 segments connected by 4 repeaters with nodes on 3 segments
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What is a bridge?
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a Layer 2 device that connects different or same-type networks
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Does a bridge allow broadcasts?
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yes
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Does a bridge forward traffic?
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not if the destination segment is the same as the originating segment
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How much latency does a bridge introduce?
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20-30%
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What do gateways do?
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enable communications between different protocols, data types, and environments
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What are non-root ports on non-root bridges considered?
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nondesignated- they neither send nor receive traffic
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What mode are nondesignated ports in?
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blocking mode- they neither send nor receive traffic
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